Electric call and alarm system.



O. O. BAKER. ELECTRIC CALL AND ALARM SYSTEM. APPLICATION FILED MAE.23, 1907.

Patented Sept. '7, 1909.

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WXLWLW Z MPQM O. 9. BAKER. ELECTRIC CALL AND ALARM SYSTEM. APPLICATION FILED MAR. 23, 1907.

933,41 2. Patented Sept. 7, 1909.

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A TTORJVEZS O. 0. BAKER. ELECTRIC CALL AND ALARM SYSTEM. APPLICATION TILED MAR. 23, 1907.

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A TTORNE 1 5 rooms of which there are supposed to be six in the present instance, and whenever a cir cuit is closed in a room by the pushing of a button or the like, the annunciator indicator card of that room will be moved to display position and an alarm bell 16 at the top of the cabinet will be sounded in order to call the attention of the clerk. At the lefthand side of the cabinet is another series of annunciators 17 which are connected in the burglar alarm system, and which are moved to display the point of entry or attempted entry.

Extending across the full width of the cabinet is a key rack 18 having numbered hooks 19 on which the room keys may be hung in the ordinary manner. Below the key rack is a hook contact board 20. This board carries a plurality of hooks 21, forty! eight in number-in the present instance, and

corresponding to the number of contact pins 11 of the clock dial. The first of these hooks is Wired to the first contact pin 11 beyond the hour number 12 of the clock, the second book to the second pin, and so on around the entire dial.

Arranged below the panel or hook switch QO-is a switchboard 23 having openings for the passage of flexible contact cords 24 that terminate in contact rings 25 which may be hung on the hooks 21, eachof these cords 24 being preferably provided with a counterweight which may be arranged in thesame manner as in telephone exchange systems, and each cord is connected in the manner hereinafter described to a wire leading to a room or other point where an alarm is to be sounded. If a callis left for any hour the clerk lifts the ring 25 belongin to theroom in which the call is to be mad e, and places said ring over the book 21 corresponding to the time at which the alarm is tobe sounded, and these hooks 21 are of sufiicient sizeto accommodate any number of rings 25, so that, if necessary, the entire number of rings may be placed on a single hook it all of the guests are to be aroused at the same time, thus overcoming one of the principal difliculties of existing systems of this type, where it is impossible to call more than'one or two guests at the same hour.

In front of the rings 25 is a series of telephone switches 27, which are under the conm1 of the clerk, and which may be closed hand for the purpose of opening communication between his telephone 25 and any of the room telephones, there being independent communication between the desk and each of the rooms.

Arranged below the switch. board .23 is a.

anel 30 bearing a number of push buttons 31 which are connected. in the calling system in such manner that by pressing any one them the clerk may sound an alarm at any time in any of the rooms for the purpose of calling the occupants attention, and if necessary for opening telephonic communication.

The bottom of the cabinet is provided with a pair of doors 32 which are shown in open position, and when these are open, access may be had to a fire alarm apparatus 33 thal is under the controi of the clerk, this apparatus being so arranged that by withdrawing a stop pin 34, the alarm circuit will be closed consecutively in the several rooms and a distinct alarm sounded in such rooms.

Below the fire alarm dial 33 is a connecting board 35 carrying binding posts 36 which are connected to the wires of a cable 37 which leads to a battery 38 located. at any convenient point.

inch of the annunciator magnets of ill: group-15 is of the construction iilusl'rated in Fig. The electro-niagnet 2-59 is carried by a suitable frame 40 to which is pivoted an armature lever 41 having a hook member 42 that passes through an opening formed in'a drop 43, and at the frontof the drop is ar ranged a display card 44 which, when the 'the clock to the alarm in the room, and when the guest closes his circuit by the depressing of a button or the like and encrgiaes the electro-magnot 39, the drop 43 will fall and the contacts will be separated, thusbreakingi the alarm circuit, as will hereinafter appear. In the diagram, Fig. 2, A indicates the clerks desk and I3 and C two separate rooms or stations where alarms are to be sounded and with which communication may be tablishcd to and from thedesk. In each of the rooms A and C is an alarm bell 50, telephone 51 and a push button 52 Tracing first a straight circuit, that is to say, from one of the push buttons 31 to the aiarm 50,

push button 52 through. wire 50 to battery,

thusshowing thatthe alarm 50 may be rung by the closing of the button or switch 31 at the clerks desk. If the clerk wishes to telephone to the guest, he closes the switch 27,

-thus cutting out the push button 31 and completing the circuit between the two teleihoncs through the wiring just described. racing now an alarm'circuit by the time mechanism, the circuit may be followed from the battery 38, through the wire 55, wire 61 to the clock frame and circuit closing hand,

thence to one of the pins 11, wire 62, hook 21, ring 25, wire 63, contact spring 17, of the annunciator, the annunciator frame wire 64 to wire 57, through bell 50, wire 08, telephone 51, wires and 60 back to battery, so

that when the circuit closing end of the clock engages the contact pin, the corresponding hook of which is connected to one of the rings 25, an alarm will be sounded in 'the room, and the alarm will continue to sound until the contact continues to pass from the peg or pin 11, there being a period of from twelve to fourteen minutes. If the guest wishes to cut off the alarm, it is necessary for him to press his button 52, and when this occurs, a circuit is closed which may be traced as followsz-starting from battery 38, through wire 55, the clerk s bell 16, wire (57, annunciator magnet. 39, wire (38 to one side of push button 52, opposite side of push button 52 and back through wire 60 to the battery, thus closing a circuit through the annunciator magnet, and when the latter is energized it attracts its armature, permitting the drop to fall and move away from the contact spring 47, so that the alarm circuit is broken, and the alarm ceases to sound. At the same time, however, the breaking of the alarin circuit does not in the least interfere with free communication be tween the desk and the room, for at any time the button may be pressed and .the clerks bell. 16 sounded,- or the clerk's button or switch 31 may be closed to sound the alarm 50 in the room. I

. In the diagram, Fig. the circuits of two rooms have been shown, and the wire (30 is common to all of them, being a common return to thebattcry', so that there are three wires leading; to each room, to wit, wires (10, 57, and (38, there being two separate wires 57 and (38 leading from each room to the clerks desk, and a third wire (30 leading from the battery around through all of the rooms.

The fire alarm apparatus is best shown in Figs 1 and 4, and includes a dial 33 hearing contact points 71 of a number equal to the number of rooms, and connected to the several rings by wires I3, as shown in Fig. 2. At the center of'the dial is an arbor l to the outer end of which is secured a contact arm 75 hearing a brush 76 which, when the hand rotates, will travel over all of the contacts 71 and close a circuit through each of the alarm circuits to each of the rooms. The hand is normally heldfrom rotation by a removable pin 84 which may be drawn out of its socket by the clerk or other person in order to allow the hand to rotate. The inner portion of the arbor 74; is connected through suitable gearing to a motor mechanism preferably in the form of a spring motor 78, and when once the pin is withdrawn the motor mechanism may travel the arbor and the hand around until the power has exhausted, and an alarm circuit will be closed through the several bells 50 in successive order. The alarm circuit may be readily traced from the battery 38, wire 55, wire 80,, arm T5, contacts 71, wires 73, wires 63, contact 47, anuunciator frame, wire (rh wire 57, bell 50, wire 58, telephone 51, wire 59 and wire 60 back to battery, so that each individual alarm 50 will be sounded when the contact brush engages the contact 71.

For a burglah alarm the annunciators 17 at the left are employed and two of these annunciators are shown in the diagranncl i 2. At any suitable point, such as a win ow, door 0' adjacent to a safe or the like, are spaced contacts which are normally out of engagement when the windowor door is closed, but in an attempt to open the window or door these contacts \Vlll be moved into engagement and the circuit will be closed which may be traced from the bat tery 38 to wire 55, clerks bell 16, wire 91, the electro-magnet 92 of the annunciator, wire 93, contacts 90, wire 95, and wire 60 back to battery, thus energizing the annunciator magnet, and at the same time sounding the alarm in the clerl-zs otlice, and for sounding a further alarm in the managers or watchmans oiiice through an extension bell. Each of the electro-magnets 92 is arranged adjacent to an armature, and when this armature is attracted it releases a drop 97 to display the locality or the point at which an attempt at entry has been made. When the drop falls it closes circuit between two contacts 98, that are arranged in circuit with a battery 100, and a lamp 101, so that the lamp circuit will be closed and a visible alarm employed as well as an audible alarm to attract the attention in the proper places. it will licsciu-rthat with a system arranged in accordance with the-present invention, the clerk may call any person at any time by dc-' pressing one of his push buttons and may open telephonic communication while the g-iest may do likewise. The clerk by propl throu 'h the elect1'o--1nag11et, whereby on clos crly adjusting the rings on the hooks 21 may cause the automatic sounding of an alarm at any room or any number of rooms at the same time, or at different times, and the guest may stop the soundingof the alarm without in any manner interfering with further free communication of the office. At the same time thewiring system is employed for the purpose of sounding both fire and burglar alarms, and in the latter case for indicating the point of attempt of entry.

I claim 1. In a system of the class described, an automatic circuitcloser, an alarm, a circuit connecting the two, a pair of contacts included in said circuit, an annunciator having a movable member forming one of said contacts, an elcctro1nagnet controlling the operation of said movable member, and an auxiliary circuit in which said clectromagnet is placed, whereby on closing the auxiliary circuit the alarm circuit may be broken.

2. In a system of the class described, an automatic circuit closer, an alarm, an annunciator including an electro-magnet, and a movable member under its control, a pair of contacts, one of which is formed by said 'movable member, a circuit connecting the automatic circuit closer, the contacts and the alarm, and an auxiliary circuit extending ing tne auxiliary circuit the alarm circuit may be broken.

3. In a system of the class described, an annunciator. and an automatic circuit closer arranged at the clerks desk, an alarm, and. a push button in each of the rooms, a circuit connection between the circuit closer and the alarm, said circuitbeing in part completed by a movable part of the annunciator, and a second circuit extending from the push button through the annunciator.

4. In a systemof the class described, an automatic circuit closer, and a source of electrical energy at the clerks desk, alarms in 'each of the rooms, an annunciator at the clerks desk, a circuit leading from the auto matic circuit closer to the alarm and under the control of the annunciator, a second circuit leading from the room through the annunciator magnet, and a common return wire leading through all of the rooms to the battery and from the battery to the mechanism atthe clerks desk.

In testimony that I claim the foregoing as my own, I have hereto atfixcd my signature in the presence of two witnesses.

OTIS O. BAKER.

\Vitnesses:

JNO. E. PARKER, J. Ross CoLHoUn. 

